This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and thus not compensated for and can lean the engine out and can furthermore permit the engine to rev going on afterward not desired causing aggressive running. As its a mechanical malformation it tends not to slant on the fault well-ventilated and you can sometimes listen a hissing noise subsequently the engine running.
Its next worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not a hundred percent pump will every consequences in insufficient fuel swine delivered to the engine. Might in addition to be worth cleaning out the idle eagerness govern motor / valve as these acquire clogged going on bearing in mind carbon and some brake cleaner washed through helps release things off.
I'm reviewing your question now, and will broadcast encourage later your respond ASAP. Rgds Greg. What malformation codes get you have. Does the engine rule taking into consideration the MAF disconnected. similar to the loud hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is forlorn measuring the freshen that is getting when the MAF, in view of that if the intake manifold is sucking in expose the air to fuel ratio will be extremely out and cause the engine to stal